Road-grader



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ROAD GRADER Patented Nov; 12, 1889.

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' blade, or swiveled, as in Figs. and 6, to give To (all whom, it may concern:

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ARCHIE BRONSON, OF CHARLESTON, MICHIGAN.

ROAD-GRADER.

SPECIFICATION forming part of Letters Patent No. 414,674, dated November 12, 1889.

Application filed July 8, 1889. Serial No. 316,786. (No model.)

ie it known that I, ARCHIE BRONSON, a citi zen of the United States, residing at Charleston, Galesburg P. 0., county of Kalamazoo, State of lllichigan, have invented a new and useful Bowl-Grader, of which the following is a specification.

This invention has for its object certain novel construction and association of parts, designed to add to the utility and facilitate the operation of the machine, all substantially as below described and claimed.

In the drawings, forminga part of this specification, Figure 1 is a plan view; Fig. 2, a section on line 6 (3 in Fig. 1; Fig. 3, a sectional elevation on line 5 5 in Fig. 1; Fig. i, a sec-' tion on line 2 2 in Fig. 3; Fig. 5, broken lettered details in Fig. 3; Fig. (3, section on line 3 3 in Fig. 5.

Referring to the lettered part of the drawings, A is the four-wheeled frame. Mounted upon the forward end of the frame is a horizontal transverse lever C, centrally pivoted at F, Figs. 1 and 3. Hinged to the ends of the blade B are draft-bars E, and the forward ends of these draft-bars are jointedly connected to the ends of lever 0, Figs. 1 and 2. The rear ends of the draft-bars E are hinged by means of the pivots 0, which pass through said bars E, and through projections or bosses R, attached to the rear face of the blade B. The bosses B may be rigidly attached to the less rigidity to the blade. The central circular portion of the lever C is provided With a series of notches (L, Fig. 1, representing in plan view the segment of a gear. A-springactuated dog P engages these notches and holds the lever G at the desired position.

At the rear of the frame A is a pivoted footlever M, and the dog P is connected with the lever M by rod orcord 1', Fig. By this means the operator on the rear seat of the machine can disengage the dog from the lever O with his foot, while his hands are employed with other levers.

In Figs. 1, 3, and l, N are two bars pivoted at one end to the stud O, which projects upward from the center of the'blade 13. From thence these bars N diverge to the rearward, and pass loosely through holes in the end of studs pendent from the sides of the frame A.

7 ends of rods L L, Fig. l.

The rear ends of the bars have each an ad justing-nut V to fix and control the adjustment of the bars. When the blade is set at an oblique angle, one of the rods N is pushed farther through the hole in the pendent stud, and the other rod prevents the blade from tilting farther when in use.

Mon n ted upon an elevated tableof the frame A, and centrally pivoted to said frame, is a transverse bar I), having a curved row of holes (2, Fig. -1, and an elongated slot at each end. ll'augers K are jointedly attached at the lower end to the blade B, and are passed loosely through said slots to admita free movement when the blade is tilted. To the posts S S are centrally pivoted the levers I l. The upper ends of the hangers K are pivoted to the outer 'ends of the levers I I. To their innerends are pivot-ally attached the upper The lower ends of said rods are attached by means of ball-andsocket joints to the front end of levers G, which levers are employed to raise and lower the blade B and to raise and lower either end of said blade. These levers are held in given positions by the ordinary dogs and ratchetplates J. The posts S are attached to the bar D, and hence they are carried with it when the blade is tilted in either direction by the lever II, as indicated by the dotted positions of parts at the center of Fig. 1. When the operator tilts the blade, he first disengages with his foot on lever M the dog P from the lever G. Then by swinging the lever H in the desired direction laterally the lever C is tilted to a like oblique angle as is the blade B, as shown by the dotted parts at left of Fig. 1, and at the front of the machine. The lever H is pivoted at X to the bar D, as in Figs. 1 and 3, and it has a projection IV on the under side which engages with the holes 0. The object of this is so that the lever H can be swung one side out of the way when not in use, which is effected by raising on said lever until the projection is free fro m the hole 0 and then swinging it in the desired direction.

Referring again to the rods L L and the joints at their lower ends, when the levers G are operated these joints allow the rods L to tilt, and when the blade 13 istilted by the leyer H said joint-s allowthe rods to turn, Fig. 4.

Having thus described my invention, What I claim, and desire to secure by Letters Patent,

1. The combination of the Wheeled frame, the front pivoted lever, the blade, draft-bars jointedly attached to said blade and the ends of the lever, a pivoted transverse bar mounted on the frame, a pivoted lever constructed and arranged to engage and swing said bar on its pivot, and hangers suspending said blade beneath the pivoted bar and frame, and arranged to swing with said bar and blade when adj usting the latter, substantially as set forth.

2. The combination of the Wheeled frame, the front pivoted lever, the blade, the draftbars jointedly connected with said lever and blade, the transverse bar mounted upon a table on the frame and pivoted thereto, the hangers suspending the blade, said hangers being loosely passed through slots in the ends of said pivoted bar, the two horizontal levers supported by said table and centrally .pivoted, the ends of these levers being pivoted to the upper end of the hangers, the levers for raising the blade, the rods attached at their lower end by ball-and-socket joint to said levers and pivoted to the contiguous ends of the horizontal pivoted levers, and a lever for tilting the transverse bar in converting the machine from a right to aleft handed, and vice versa, substantially as set forth.

In testimony of the foregoing 1 have hereunto subscribed my name in presence of two witnesses.

ARCHIE BRONSON.'-

Witnesses:

Z. B. DURKEE, W. ENGLISH. 

